strong



(No Model.) Y l 2 Sheets-Sheet 1.

` F. S. STRNG.

YLEATHER SPLITTINGMAGHINE. l No. 291,641. Patented Jen. 8, 1884.

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nused in connection with a fixed knife.

UNTTED STATES PATENT Trice.

FREDERICK S. STRONG, OF EAST BRIDGEVATER, MASSACHUSETTS, AS` SIGNOR- TO THE CARVER COTTON GIN COMPANY, OF SAME PLACE.

LEATHER-SPLITTING MACHINE.

SPECIFICATION `forming part of Letters Patent No. 91,641, dated January 8, 1884.

l Application filed November 15, 1883. (No model.) i I .T0 @Z5 w/wm. it mfr/y concern: l

Be it known that I, FREDERICK S. STRONG, a citizen of the United States, residing at East Bridgewater, inthe county of Plymouth and State of Massachusetts, have invented certain new and useful j Improvements in `Leather- Splitting Machines, of which the following is a speciiication.

j My invention relates to that class of leathersplitting machines in which two feed-rolls are Heretofore these machines have been made usually with the upper roller adjustable bycams,which revolve upon non-adj ustable axes, and with the lower-roll adjustable by screws at each end, and made movable by separatelevers. ln my device the upper roll is -controlled by cams upon shaft" which is adjustable, while the lower roll is adjustable at each end by connected levers, so arranged that a single movement of the foot will depress the lower roll, but not disturb the adjusting device, so that when the foot is removed from the lever the lower roll will return toits position accurately adjusted at each end. l attain these objects by the mechanism illustrated in the accompanying drawings, in Which- Figure lis a view, partly in elevation and partly in vertical section. Fig. 2 is a cross vertical section taken through the center. Fig. 3 is a plan. Fig. 4 is an enlarged cross-section taken on line y y of Fig. 3, showingl the arrangement of the housings.

A, Figs. 1 and 2, represents the base and stand of the machine.

B C C represent the frame of the machine. D D', Figs. 1 and 2, are the feed-rolls, and E the knife. The upper feedroll, D, is hung in movable boxes, made as shown at C', Figs.

ency of the spring Cs being to force the box C 5o action lof the springs C3. By revolving the cam-shaft K by the hand-wheel K the cams K2 may be turned to occupy any desired position, so as to allow the spring C to force theU boxes C' upward, and thus adjust the upper roller, D, to the work to be done. shaft K is mounted in adjustable boxes, one at each end, like the box H in Fig. 4. Each of these boxes is fitted in a suitable casing, so that it may be adjusted vertically by meansof the screw H. called differential l 7--that is, it has a thread, h, of one pitch, which works in the upper part of the xed casing, and a thread, h, of different pitch and different tend, which works in This carn- 6o 'This screw H is of the class 65 the box H, so that by turning the screw H 7o the ends of the cam-shaft K may be accurately adjusted, and Vthus any dierence of wear of the two cams and their adjuncts may be allowed for.

'The lower feed-roll, D', is hung in boxes, one 7 5 of which is shown at L, Figs. 1 and 4.. Each of these boxes L has a projection, L',4 in which a .j

recess is formed for the end of the lever L2, l Figs. 1 and 4. Each of the levers L'z is hung upon a pivot, L3, one of the levers being sup- 8o ported by the projections B', Fig. 1, and the other by the projection B2, Fig. 1. The inner ends of these two levers L, Fig. 1, are connected by a link-piece, M, which is united to the vertical rod M by a pivot, m, this rod force the rod M downward. This action ofthe rod M is communicated to the inner ends of the levers Lz L2, so as to bring them down, and consequently their outer ends with boxes L L `spring S is to force the lower` roll, D', upward.

upward. In other words, the tendency of the This upward motion oi' the roll D' is adjusted at each end bythe device which I will now proceed to describe.

R R, Fig. 1, are screw-rods, each provided with a hand-wheel, R', and each working in a screw-socket, R2, Fig. l, afiixed to the frame ofthe machine.

R3 are check-nuts, which serve to hold the screw-rods permanently in place. As these screw-rods R R determine accurately thelimit of the downward motion of the levers L2, they consequently limit the upward motion of the g outer ends of the levers-that is, they limit l and adjust the two ends of the lower roll, D', so that it (the said lower roll, D') maybe accurately adjusted in relation to the knife E.

L3, Figs. 1 and 4L, is a set-screw located in the lower end of the projection L', and serves to take up the lost motion that would otherwise exist between the lever L2 and projection L'.

From the above it may be seen that the user f the machine, by simply depressing the foot lever P, can bring the lower roll, D', down and out of working position without disturbing the adjusting device, so that when the lever P is released the roll. D' will return at once to its exactly adjusted position. The, sunk-'head knife-holding bolt T, Fig. 2, is provided with a iixed collar, t, against which a spring, T', acts, the lower end of the spring T' resting upon the shoulder T2, the action of the spring'being upward, so that when the nut T3 is loosened the bolt T is thrown out by the action of the sp1-ing, thus'saving the user eonsiderable time, which he would otherwise have to use in getting it out.

I claim as my inventionl. In a leather-splitting machine, the combination of the upper roll, D, the boxes C' C', springs C3 C3, cams K2 K2, and shaft K, with the adjustable boxes H H and screws H' H', all operating substantially as described, and for the purpose set forth.

2. In a leather-splitting machine, the combination of the lower roll, D', boxes L L, having projections L L', levers L2 L2, and adjustingscrews R R, with the link l/I, rods M' M2, spring S, and foot-lever I), all operating together substantially as described, and for the purpose set forth.

' 3. The combination ofthe sunk-head knifeholding bolt T, having` a fixed collar, t, with the spring T', arranged to operate substantially as described, and i'or the purpose set forth.

FREDERICK S. STRONG.

Vitnesses:

GPL-is; SPAULDING, FRANK G. PARKER. 

